I was tired of all the freeware with spam or adware on the Internet. I gave this app a try and it Converts MP4 to Mp3 on my Windows 7 Pro. It converts video files to other formats also. I'm not sure if it will convert the videos you buy from Apple since those files are encrypted. You'll need to ask that in the question section on Amazon. I followed the youtube instructions and it does the job.
https://www.youtube.com/watch?v=I-HAgKYfqT8&list=PLwURYFQvHBAtG8wqzyVgOQ1WtEYSkiscO&index
The app does what I need it to do and you can't beat the price ($5). Hats off to the developer.

dmMediaConverter [Download]
3.5
| 41 ratingsPrice: 3
Last update: 12-29-2024
About this item
stream copy (video, audio, subtitle)
stream conversion - almost any codec into:
video - h264, h265, vp8, vp9
audio - aac, mp3, flac, pcm, vorbis, opus
subtitles - srt, ass, ssa, mov_text, dvdsub
stream conversion - almost any codec into:
video - h264, h265, vp8, vp9
audio - aac, mp3, flac, pcm, vorbis, opus
subtitles - srt, ass, ssa, mov_text, dvdsub